Aluminium Brass Heat Exchanger Tubes | C68700 Condenser Tube Supplier India

Q: What standards does Solitaire Overseas follow for aluminium brass heat exchanger tubes?

We manufacture and supply Aluminium Brass Heat Exchanger Tubes as per ASTM B111, ASME SB111, DIN 1785, JIS H6870, and BS 2871 standards.

Q: What sizes are available for aluminium brass heat exchanger tubes?

We supply Aluminium Brass Heat Exchanger Tubes in OD ranging from 4.76 mm to 104.78 mm, with wall thickness from 0.508 mm minimum, and lengths up to 15 meters. Custom dimensions are available on request.

Aluminium Brass Heat Exchanger & Condenser Tubes Supplier & Exporter in India

Aluminium Brass Heat Exchanger Tubes (UNS C68700) are copper-zinc-aluminium alloy tubes manufactured as per ASTM B111 / ASME SB111 standard, specifically engineered for use in surface condensers, shell-and-tube heat exchangers, and evaporators operating with high-velocity seawater, brackish water, and salt water. Solitaire Overseas is a leading Aluminium Brass Heat Exchanger Tube supplier in India, stocking the complete range of C68700 seamless and welded tubes from our Mumbai facility for fast delivery worldwide.

The C68700 alloy composed of approximately 76–79% Copper, 22% Zinc, and 2% Aluminium forms a stable, self-healing aluminium oxide protective film on the tube surface. This film resists erosion-corrosion and impingement attack even at elevated water velocities up to 2.5 m/s, making it the preferred material over Admiralty Brass (C44300) in demanding marine and power plant environments. The addition of Arsenic (0.02–0.06%) as dezincification inhibitor gives these tubes a significant advantage in chloride-rich and marine cooling systems.

We supply Aluminium Brass Condenser Tubes and Aluminium Brass Heat Exchanger Tubes to power plants, desalination plants, shipbuilding yards, oil refineries, and HVAC manufacturers across India, UAE, Saudi Arabia, USA, UK, and 50+ countries.

Why Aluminium Brass for Heat Exchangers?
Specification of Aluminium Brass Heat Exchanger & Condenser Tubes
Equivalent Grades - Aluminium Brass Heat Exchanger & Condenser Tubes
Chemical Composition of Aluminium Brass Heat Exchanger & Condenser Tubes
Mechanical & Physical Properties of Aluminium Brass Heat Exchanger Tubes
Types of Aluminium Brass Heat Exchanger Tubes We Supply
Applications of Aluminium Brass Heat Exchanger Tubes & Condenser Tubes
Why Choose Solitaire Overseas?
FAQ’s - Aluminium Brass Heat Exchanger / Condenser Tubes
Related Products

Why Aluminium Brass for Heat Exchangers?

Aluminium Brass C68700 is the most widely specified copper alloy tube for heat exchanger applications involving saline and high-velocity water. Compared to standard brass alloys, it offers several key advantages:

Self-Healing Oxide Film: The aluminium content forms a dense, self-repairing protective oxide layer that regenerates automatically when damaged — extending tube service life significantly in marine heat exchangers and condensers.
Superior Impingement Resistance: C68700 tubes resist impingement attack at seawater velocities up to 2.5 m/s where Admiralty Brass would fail. This makes them the preferred choice for high-velocity cooling circuits in power plants.
Dezincification Inhibition: The addition of Arsenic (0.02–0.06%) as inhibitor prevents dezincification — a selective zinc leaching that weakens standard brass tubes in chloride-rich environments.
Excellent Thermal Conductivity: Aluminium Brass maintains high thermal conductivity, ensuring efficient heat transfer across the tube wall — critical for surface condensers and shell-and-tube heat exchangers.
High Mechanical Strength: Tensile strength of 414 MPa and yield strength of 186 MPa allow these tubes to handle elevated pressures without deformation.
Long Service Life: The combination of corrosion resistance, strength, and the self-healing film gives C68700 heat exchanger tubes one of the longest service lives among copper alloy tube materials.

Specification of Aluminium Brass Heat Exchanger & Condenser Tubes

As leading Aluminium Brass Tubes manufacturers, we adhere to the highest standards. This table details the general specification for our c68700 aluminum brass products.

Specification	Details
Product Name	Aluminium Brass Heat Exchanger Tube / Condenser Tube
UNS Grade	C68700
Equivalent Grades	CuZn22Al2 (DIN) \| CZ110 (BS) \| CuZn20Al2As (EN)
Standards	ASTM B111 \| ASME SB111 \| DIN 1785 \| JIS H6870 \| BS 2871
Outer Diameter (OD)	4.76 mm to 104.78 mm
Wall Thickness	0.508 mm minimum
Length	Up to 15 meters (custom lengths available)
Manufacturing Type	Seamless (Cold-Drawn) \| Welded (ERW)
Tube Forms	Straight Length \| U-Bend \| Ferrule Stock
Temper	O61 (Annealed) \| H (Hard-Drawn) \| HH \| QH
Ends	Plain End \| Beveled End \| Threaded
Testing	Eddy Current \| Hydrostatic \| Flattening \| Expansion \| Residual Stress
Applications	Heat Exchangers \| Surface Condensers \| Evaporators \| Desalination Plants

Equivalent Grades - Aluminium Brass Heat Exchanger & Condenser Tubes

Below are the equivalent grades for our ASTM B111 UNS C68700 tubes

Standard	Designation / Grade	ISO Name
ASTM / ASME	UNS C68700	—
DIN (German)	WNr 2.0460 / DIN 1785	CuZn20Al2
BS (British)	CZ110	CuZn22Al2
EN (European)	CW702R	CuZn20Al2As
JIS (Japanese)	JIS H6870 C6870	—

Chemical Composition of Aluminium Brass Heat Exchanger & Condenser Tubes

Understanding the aluminium brass composition is key to performance. The table below details the precise chemical requirements for our high-quality C68700 Aluminum brass tubes.

Element	Symbol	Composition (%)
Copper	Cu	76.0 – 79.0
Aluminium	Al	1.8 – 2.5
Arsenic (Inhibitor)	As	0.02 – 0.06
Iron	Fe	0.05 max
Lead	Pb	0.05 – 0.07 max
Zinc	Zn	Balance

Mechanical & Physical Properties of Aluminium Brass Heat Exchanger Tubes

Our Aluminium Brass Tubes are valued for their mechanical integrity. Check the minimum required mechanical and physical properties in the table below.

Property	Value	Unit
Density	8.33	g/cm³
Tensile Strength (min)	414	MPa (60 KSI)
Yield Strength 0.2% Offset (min)	186	MPa (27 KSI)
Elongation (min)	55	%
Hardness (Annealed)	55–75	HRB
Thermal Conductivity	100	W/m·K
Max. Allowable Velocity (Seawater)	2.5	m/s
Grain Size (Annealed O61 Temper)	0.010 – 0.045	mm

Types of Aluminium Brass Heat Exchanger Tubes We Supply

Aluminium Brass Seamless Pipe

Cuzn22 Al2 Aluminium Brass Polish Tubing

C68700 Aluminium Brass Pipe

ASTM B111 Aluminium Brass Square Tube

C 68700 Round Pipes

Brass C68700 Welded Tubing

Aluminium Brass Alloy Condenser Tubes

Aluminium Brass Seamless Tubes

Applications of Aluminium Brass heat exchanger tubes & Aluminium Brass condenser tubes

Aluminium Brass C68700 heat exchanger tubes and condenser tubes are specified across a broad range of industries due to their unique combination of corrosion resistance and thermal performance:

Power Generation: Surface condensers, feedwater heaters, cooling water systems in thermal and nuclear power stations where inhibited admiralty brass fails from impingement at high water velocities.
Marine & Shipbuilding: Shipboard heat exchangers, oil coolers, seawater cooling circuits, central coolers, and auxiliary condensers in vessels and offshore platforms.
Desalination Plants: Multi-stage flash (MSF) and multi-effect distillation (MED) desalination evaporators and heat recovery sections.
Oil & Gas / Refineries: Process coolers, crude oil heat exchangers, gas coolers, and lube oil coolers in petrochemical plants and offshore oil rigs.
HVAC Systems: Chilled water systems, industrial cooling towers, district cooling heat exchangers.
Boiler Blowdown Heat Exchangers: Recovering heat from boiler blowdown in industrial and utility boilers.
Turbine Oil Coolers & Fuel Oil Heaters: Lubricating oil cooling and fuel heating systems in power turbines and marine diesel engines.
Air Coolers / Compressed Air Systems: Inter-coolers and after-coolers in industrial air compression systems.
Distillers: Potable water distillation systems on ships and in remote areas.

Why Choose Solitaire Overseas?
Solitaire Overseas is a trusted Aluminium Brass Heat Exchanger Tube manufacturer and exporter based in Mumbai, India, serving clients globally for over two decades. Key reasons clients choose us:

✔ ASTM B111 / ASME SB111 certified tubes with full mill test certificates (MTC) available

✔ 100% Eddy Current Testing and Hydrostatic Testing on all heat exchanger tubes

✔ Large ready stock of C68700 seamless and welded tubes for fast delivery

✔ Custom tube lengths, wall thickness, and U-bend configurations available

✔ Competitive pricing with transparent quotes within 24 hours

✔ 3.2 Material Test Certificates available on request (third-party inspection accepted)

✔ Export-ready packaging: ply wooden box, plastic wrap, steel strapping for sea-worthy delivery

✔ Delivery to 50+ countries including UAE, Saudi Arabia, USA, UK, Japan, and Australia

FAQ’s - Aluminium Brass Heat Exchanger / Condenser Tubes

What is aluminium brass heat exchanger tube?

Aluminium Brass Heat Exchanger Tube (UNS C68700) is a copper-zinc-aluminium alloy tube manufactured to ASTM B111 / ASME SB111 standard. It is specifically designed for use in surface condensers, shell-and-tube heat exchangers, and evaporators where high-velocity seawater or brackish water is the cooling medium.

What is the difference between aluminium brass and admiralty brass condenser tubes?

Admiralty Brass (C44300) contains 71% copper, 28% zinc, and 1% tin, while Aluminium Brass (C68700) contains 76–79% copper, 22% zinc, and 2% aluminium. Aluminium Brass provides superior resistance to impingement attack and high-velocity seawater corrosion compared to Admiralty Brass.

What standards does Solitaire Overseas follow for aluminium brass heat exchanger tubes?

Solitaire Overseas manufactures and supplies Aluminium Brass Heat Exchanger Tubes as per ASTM B111, ASME SB111, DIN 1785, JIS H6870, and BS 2871 standards.

What sizes are available for aluminium brass heat exchanger tubes?

We supply Aluminium Brass Heat Exchanger Tubes in outside diameters ranging from 4.76 mm to 104.78 mm, with wall thickness starting from 0.508 mm minimum, and lengths up to 15 meters. Custom dimensions are also available on request.

Where are aluminium brass heat exchanger tubes used?

These tubes are widely used in power plant surface condensers, desalination plants, marine heat exchangers, offshore oil rigs, ship building, evaporators, distillers, refineries, and HVAC cooling systems.